US4452722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suspensions containing microfibrillated cellulose
Assignee: Rayonier Inc
•
Filing: 1982-11-15
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Granted: 1984-06-05
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Expires: 2002-11-15
Abstract
Abstract A suspension of a finely divided material in a liquid suspending medium which swells cellulose, the suspension containing microfibrillated cellulose in an amount sufficient to produce a stable, homogeneous suspension. The finely divided materials are hydrophilic polymers.
Inventors
- 👤 Albin F. Turbak
- 👤 Fred W. Snyder
- 👤 Karen R. Sandberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:04
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08J3/05; C08L; C08L1/00; C08L1/02; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/20; C09K8/206; D; D21; D21C; D21C9/00; D21C9/001; C08J2301/00; C08J2301/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
25 words
A suspension of a finely divided polymer material in water, said suspension containing microfibrillated cellulose in an amount sufficient to produce a stable, homogeneous suspension.
Claim 2
Dependent Claim
25 words
A suspension of a finely divided polymer material in water, said suspension containing microfibrillated cellulose in an amount sufficient to produce a stable, homogeneous suspension.
Claim 3
Dependent Claim
9 words
The suspension of claim 1 containing a hydrophilic polymer.
Claim 4
Dependent Claim
28 words
The suspension of claim 2 in which the hydrophilic polymer is selected from the group consisting of cellulose esters and ethers, synthetic acid polymers, natural gums and starches.
Claim 5
Dependent Claim
48 words
The suspension of claim 1 in which the microfibrillated cellulose is present in an amount ranging from 0.25% to the major ingredient of the suspension, said proportions being based on the weight of cellulose solids present as microfibrillated cellulose as compared to the total weight of the suspension.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-06-05 | 1987-12-05 | 1988-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-05 | 1991-12-05 | 1992-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-05 | 1995-12-05 | 1996-06-05 | $7700.00 | Window Closed / Lapsed |